ESDA6V1-4BC6 QUAD BIDIRECTIONAL TRANSIL SUPPRESSOR FOR ESD PROTECTION ASD

Transcription

1 ASD ESDA6V1-4BC6 QUAD BIDIRECTIONAL TRANSIL SUPPRESSOR FOR ESD PROTECTION MAIN APPLICATIONS Where transient overvoltage protection in ESD sensitive equipment is required, such as: Computers Printers Communication systems Video equipment This device is particularly adapted to the protection of symmetrical signals FEATURES 4 Bidirectional Transil functions ESD Protection for data, Signal and V CC Bus Stand off voltage range: 5 V Low leakage current Peak pulse power (8/20µs); 80W Channel separation: 80dB typ.@20khz DESCRIPTION The ESDA6V1-4BC6 is a monolithic array designed to protect up to 4 lines in a bidirectional way against ESD transients. The device is ideal for situations where board space is at a premium. BENEFITS High ESD protection level High integration Suitable for high density boards COMPLIES WITH THE FOLLOWING STANDARDS: IEC level 4: 15kV (air discharge) 8kV (contact discharge) MIL STD 883E-Method : class3b (Human Body Model) SOT23-6L Table 1: Order Code Part Number ESDA6V1-4BC6 Figure 1: Functional Diagram Marking BS TM: ASD is a trademark of STMicroelectronics. November 2004 REV. 2 1/6

2 Table 2: Absolute Maximum Ratings (T amb = 25 C) Symbol Parameter Value Unit MIL STD 883C - Method V PP ESD discharge IEC air discharge 15 kv IEC contact discharge 8 P PP Peak pulse power (8/20µs) 80 W T j Junction temperature 150 C T stg Storage temperature range -55 to +150 C T Maximum lead temperature for soldering during 10 s at 5mm for L case 260 C T op Operating temperature range (note 1) -40 to +125 C Note 1: Variation of parameters is given by curves. Table 3: Electrical Characteristics (T amb = 25 C) Symbol Parameter V RM Stand-off voltage V BR Breakdown voltage V CL Clamping voltage I RM Leakage current I PP Peak pulse current αt Voltage temperature coefficient V F Forward voltage drop C Capacitance Dynamic resistance R d VCL VBR Rd V RM I I RM I PP V V I R I V RM R d αt C Type min. max. max. typ. max. typ. note 2 0V bias V V ma µa V Ω 10-4 / C pf ESDA6V1-4BC Note 2: Square pulse, I PP = 3A, t p =2.5µs. Figure 2: Relative variation of peak pulse power versus initial junction temperature P PP[Tj initial] / P PP[Tj initial=25 C] T j( C) Figure 3: Peak pulse power versus exponential pulse duration P PP(W) Tj initial = 25 C t p(µs) /6

3 Figure 4: Clamping voltage versus peak pulse current (typical values, rectangular waveform) I PP(A) t p = 2.5µs V CL(V) Tj initial = 25 C Figure 5: Junction capacitance versus line voltage applied (typical values C(pF) 50 F = 1MHz 45 V OSC = 30mV Tj = 25 C V R(V) Figure 6: Relative variation of leakage current versus junction temperature (typical values) Figure 7: Analog crosstalk test configuration 100 I [T ] / I [T =25 C] R j R j 50Ω I/O1 unloaded V G Port 1 10 GND 50Ω T j( C) I/O6 Port 2 1. ESD protection by ESDA6V1-4BC6 With the focus of lowering the operation levels, the problem of malfunction caused by the environment is critical. Electrostatic discharge (ESD) is a major cause of failure in electronic system. Transient Voltage Suppressors are an ideal choice for ESD protection and have proven capable in suppressing ESD events. They are capable of clamping the incoming transient to a low enough level such that damage to the protected semiconductor is prevented. Surface mount TVS arrays offer the best choice for minimal lead inductance. They serve as parallel protection elements, connected between the signal line to ground. As the transient rises above the operating voltage of the device, the TVS array becomes a low impedance path diverting the transient current to ground. 3/6

4 Figure 8: Bidirectional protection for 0V biased signals DRIVER CONNECTOR The ESDA6V1-4BC6 array is the ideal product for use as board level protection of ESD sensitive semiconductor components. The tiny SOT23-6L package allows design flexibility in the design of crowded boards where the space saving is at a premium. This enables to shorten the routing and can contribute to improve ESD performance. 2. Circuit Board Layout Circuit board layout is a critical design step in the suppression of ESD induced transients. The following guidelines are recommended : The ESDA6V1-4BC6 should be placed as near as possible to the input terminals or connectors. Minimise the path length between the ESD suppressor and the protected device Minimise all conductive loops, including power and ground loops The ESD transient return path to ground should be kept as short as possible. Use ground planes whenever possible. Figure 9: Ordering information scheme ESDA 6V1-4B C6 ESD Array Breakdown Voltage (min) 6V1 = 6.1 Volt Number and type of lines protected 4B = 4 Bidirectional lines Package C6 = SOT23-6L 4/6

5 Figure 10: SOT23-6L Package Mechanical Data DIMENSIONS REF. Millimeters Inches A2 A Min. Typ. Max. Min. Typ. Max. A D A A1 b A b L C D θ H E E e H c e e L θ Figure 11: Foot Print Dimensions (in millimeters) Table 4: Ordering Information Part Number Marking Package Weight Base qty Delivery mode ESDA6V1-4BC6 BS77 SOT23-6L 16.7 mg 3000 Tape & reel Table 5: Revision History Date Revision Description of Changes Nov A First issue. 4-Nov SOT23-6L package dimensions change for reference D from 3.0 millimeters (0.118 inches) to 3.05 millimeters (0.120 inches). 5/6

6 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners 2004 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 6/6